Modelling neutron transport in planetary media via analytical multigroup diffusion theory

P. Panfili, A. Luciani, R. Furfaro, B. D. Ganapol, D. Mostacci

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A novel analytical solution to the 1D, steady-state, multi-slab, multi-group diffusion equation is proposed as a mean to compute the energy-dependent galactic cosmic ray-induced neutron fluxes established in planetary media. More specifically, the proposed algorithm is implemented to allow fast and highly accurate determination of low-energy cosmic ray neutrons inside the Earth's surface and atmosphere. Two sets of experimental measurements have been considered to validate our model. In both cases, a good agreement between the calculated and observed neutron fluxes is achieved. Subsequently, neutron diffusion calculations have been performed for various Earth-based scenarios comprising (a) two-slab (air-soil) configuration and (b) three-slab (air-soil-ice) configuration to investigate the functional relationship between soil composition and neutron spatial distribution.

Original languageEnglish (US)
Pages (from-to)340-344
Number of pages5
JournalRadiation Effects and Defects in Solids
Issue number5-6
StatePublished - May 2009


  • Diffusion
  • Earth
  • Galactic cosmic rays
  • Neutrons

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • General Materials Science
  • Condensed Matter Physics


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